 /*******************************************************************************
  * Copyright (c) 2001, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.views.properties.tabbed;

 import java.util.List ;

 import org.eclipse.jface.viewers.IFilter;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.ui.IWorkbenchPart;

 /**
  * Represents a section descriptor on the tabbed property sections extensions.
  *
  * @author Anthony Hunter
  */
 public interface ISectionDescriptor {

     /**
      * If enabledFor is not specified in the descriptor, enable for any selection.
      */
     public final int ENABLES_FOR_ANY = -1;

     /**
      * Get the unique identifier for the section.
      *
      * @return the unique identifier for the section.
      */
     public String getId();

     /**
      * Get the section filter instance for this section. Return null if no
      * filter for this section.
      *
      * @return the section filter instance.
      */
     public IFilter getFilter();

     /**
      * Get the valid input types for this section.
      *
      * @return the valid input types for this section.
      */
     public List getInputTypes();

     /**
      * Get the class that implements this section.
      *
      * @return the class that implements this section.
      */
     public ISection getSectionClass();

     /**
      * Get the target tab where this section will appear.
      *
      * @return the target tab where this section will appear.
      */
     public String getTargetTab();

     /**
      * Get the value for section enablement which is a precise number of
      * items selected. For example: enablesFor="1" enables the section only when
      * one item is selected. If not specified, enable for any selection and return ENABLES_FOR_ANY.
      *
      * @return the value for section enablement.
      */
     public int getEnablesFor();
         
     /**
      * Determines if this section applies to the selection.
      * @param part the current workbench part.
      * @param selection the selection.
      * @return <code>true</code> if this section applies to the current
      * selection.
      */
     public boolean appliesTo(IWorkbenchPart part, ISelection selection);

     /**
      * Get the section identifier below which this section is displayed. <code>"top"</code>
      * is returned if this section is the top most section or if there is one
      * section in the tab.
      *
      * @return the section identifier.
      */
     public String getAfterSection();
 }

